Abstract:
Investigation of water chemistry, biology, and circulation in the Mississippi Bight. All CONCORDE cruises were designed to provide observational (physical, chemical, biological) data on the Bight for use in a synthetic model describing oil exposure potential. This specific sampling was to obtain groundwater samples and ancillary seawater to constrain the composition of submarine groundwater discharge emanating into the Mississippi Sound and Bight. Sampling was conducted between 2016-04-26 and 2019-06-17. Cruise was led by chief scientist Alan M. Shiller.
Suggested Citation:
Shiller, Alan M., Hannah Box, Melissa Gilbert, DongJoo Joung, and Virginie Sanial. 2021. Water chemistry data for groundwater and ancillary seawater (surface or bottom) samples collected in Mississippi Sound and Mississippi Bight, 2016-04-26 to 2019-06-17. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/VB1D64CQ
Purpose:
Investigation of water chemistry, biology, and circulation in the Mississippi Bight. All CONCORDE cruises and field work were designed to provide observational (physical, chemical, biological) data on the Bight for use in a synthetic model describing oil exposure potential. This specific field work was centered on obtaining groundwater samples and ancillary seawater in order to examine the composition of submarine groundwater discharge (SGD) emanating into the Mississippi Sound and Bight. The data will subsequently be used to estimate the flux of SGD into the Bight and its impact on nutrient cycling and hypoxia.
Data Parameters and Units:
Location, Sample ID, Date (mm/dd/yy), Latitude [°N], Longitude [°E], Type, Sampler (Grab, Peri pump, Push point, Grab (diver)), Depth-1 [m] (Depth below air-sea interface), Depth-2 [m] (Depth below sediment surface), Salinity [PSS-78], NO3+NO2 [µmol/kg], NO2- [µmol/kg], NH4+ [µmol/kg], Total dissolved nitrogen (TDN) [µmol/kg], Dissolved inorganic nitrogen (DIN) [µmol/kg], Dissolved organic nitrogen (DON) [µmol/kg], O4 [µmol/kg], Si(OH)4 [µmol/kg], Ba [nmol/kg], Cs [nmol/kg], Mo [nmol/kg], δ18O(water) [‰ VSMOW], δD(water) [‰ VSMOW], Ra-223 [dpm/100L], Ra-224 [dpm/100L], Ra-226 [dpm/100L], Ra-228 [dpm/100L], CH4 [nM]
Methods:
For dissolved Si analysis - Please refer to Brzezinski et al., 1995
For dissolved Mo analysis - Please refer to Ho et al., 2018
For dissolved Ba analysis - Please refer to Joung and Shiller, 2014
For dissolved radium analysis - Please refer to Kipp L. et al., 2018
For dissolved inorganic N and P analysis - Please refer to Maclntyre et al., 2011
For water isotope analysis - Please refer to Sanial et al., 2019
For dissolved Mo and Cs analysis - Please refer to Shim et al., 2012
For Total Dissolved Nitrogen (TDN) analysis - Please refer to Solorzano and Sharp, 1980
For CH4 analysis - Please refer to Roberts and Shiller, 2015
Provenance and Historical References:
Brzezinski, Mark A., and David Nelson. 1995. The annual silica cycle in the Sargasso Sea near Bermuda. Deep Sea Research Part I: Oceanographic Research Papers, 42(7), 1215–1237. DOI:10.1016/0967-0637(95)93592-3.
Ho, Peng, Jong Mi Lee, Maiji Iris Heller, Phoebe J. Lam, and Alan M. Shiller. 2018. The distribution of dissolved and particulate Mo and V along the U.S. GEOTRACES East Pacific Zonal Transect (GP16): The roles of oxides and biogenic particles in their distributions in the oxygen deficient zone and the hydrothermal plume. Marine Chemistry, 201, 242–255. DOI: 10.1016/j.marchem.2017.12.003.
Joung, DongJoo, and Alan M. Shiller. 2014. Dissolved barium behavior in Louisiana Shelf waters affected by the Mississippi/Atchafalaya River mixing zone. Geochimica et Cosmochimica Acta, 141, 303–313. DOI: 10.1016/j.gca.2014.06.021.
Kipp, Lauren E., Virginie Sanial, Paul B. Henderson, Pieter van Beek, Jean-Louis Reyss, Douglas E. Hammond, Willard S. Moore, Matthew A. Charette. 2018. Radium isotopes as tracers of hydrothermal inputs and neutrally buoyant plume dynamics in the deep ocean. Marine Chemistry, 201, 51–65. DOI: 10.1016/j.marchem.2017.06.011.
Macintyre, Hugh L., Adrienne L. Stutes, William L. Smith, Carol P. Dorsey, Ann Abraham, and Robert W. Dickey. 2010. Environmental correlates of community composition and toxicity during a bloom of Pseudo-nitzschia spp. in the northern Gulf of Mexico. Journal of Plankton Research, 33(2): 273–295. DOI:10.1093/plankt/fbq146.
Roberts, Hannah M. and Alan M. Shiller. 2015. Determination of dissolved methane in natural waters using headspace analysis with cavity ringdown spectroscopy. Analytica Chimica Acta. 856: 68-73, DOI: 10.1016/j.aca.2014.10.058.
Sanial, Virginie, Alan Shiller, Dongjoo Joung, and Peng Ho. 2019. Extent of Mississippi River water in the Mississippi Bight and Louisiana Shelf based on water isotopes. Estuarine, Coastal and Shelf Science. 226: 106196. DOI: 10.1016/j.ecss.2019.04.030.
Shim, Moo-Joon, Peter W. Swarzenski, and Alan M. Shiller. 2012. Dissolved and colloidal trace elements in the Mississippi River delta outflow after Hurricanes Katrina and Rita. Continental Shelf Research, 42: 1–9. DOI: 10.1016/j.csr.2012.03.007.
Solórzano, Lucia, and Johnathan H. Sharp. 1980. Determination of total dissolved nitrogen in natural waters1. Limnology and Oceanography, 25(4): 751–754. DOI: 10.4319/lo.1980.25.4.0751.
Folch Jordi, M. Lees, and G.H. Sloane Stanley. 1957. A simple method for the isolation and purification of total lipides from animal tissues. Journal of Biological Chemistry. 226(1):497-509. PMID: 13428781.
Morrison, William R. and Lloyd M. Smith. 1964. Preparation of fatty acid methyl esters and dimethylacetals from lipids with boron fluoride-methanol. Journal of Lipid Research, 5, 600-608. DOI: 10.1016/S0022-2275(20)40190-7.
Christie, William W. 1989. Gas chromatography and lipids. P.J. Barnes and Associates (The Oily Press Ltd), Bridgewater, UK.
View Metadata